Genetic Variation in the Indoleamine 2,3-Dioxygenase Gene in Pre-eclampsia

Haruki Nishizawa, Takema Kato, Sayuri Ota, Sachie Nishiyama, Kanako Pryor-Koishi, Machiko Suzuki, Makiko Tsutsumi, Hidehito Inagaki, Hiroki Kurahashi, Yasuhiro Udagawa

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Problem To investigate the contribution of genomic variations in the indoleamine 2,3-dioxygenase (IDO) gene to the onset of pre-eclampsia.Method of study We examined sequence variations in the IDO1 gene using placental genomic DNA from 35 pre-eclamptic patients and 32 normotensive pregnant women.Results A case-control study revealed that none of the common variants influences the risk of disease. Sequencing of each IDO1 exon in diseased subjects revealed rare variants. This variation, c.-147_150delGAAA, was located within the 5'-untranslated region of the IDO1 gene, and its homozygote was identified only in pre-eclamptic subjects. However, despite the low levels of IDO expression and enzyme activity in the c.-147_150delGAAA homozygote, reporter assays indicated that this variation does not affect gene expression.Conclusion Our findings indicate that genetic alteration of fetal IDO gene does not appear to be a primary cause of pre-eclampsia.

Original languageEnglish
Pages (from-to)68-76
Number of pages9
JournalAmerican Journal of Reproductive Immunology
Issue number1
Publication statusPublished - 07-2010

All Science Journal Classification (ASJC) codes

  • Immunology and Allergy
  • Immunology
  • Reproductive Medicine
  • Obstetrics and Gynaecology


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